flexible chiral Lewis acidic boron-based catalysts in multiselective Diels–Alderreactions was investigated. The U-shaped catalysts can recognize substituents at the terminal acetylene moiety of propynal based on steric factors and can also recognize alkyne and alkene substrates based on the match/mismatch between the catalysts and substrates. Moreover, even in a mixture of different catalysts and substrates
研究了构象灵活的手性路易斯酸性硼基催化剂的 U 形腔在多选择性狄尔斯-阿尔德反应中的影响。 U型催化剂可以基于空间因子识别丙醛末端乙炔部分的取代基,还可以基于催化剂和底物之间的匹配/不匹配来识别炔烃和烯烃底物。此外,即使在不同催化剂和底物的混合物中,所需的竞争反应也可以多选择性地进行。这项概念验证研究应有助于体外人工酶类催化的发展。